Key matrix for a handset



FIG. 1 is a bottom plan view of the key matrix for a handset;

FIG. 2 is a right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a perspective front view thereof; and,

FIG. 8 is a perspective rear view thereof.

The portion of the handset shown in broken lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a key matrix for a handset, as shown. 